For a machine to be a heat engine, what kind of conversion must it perform? a. work into heat b. heat into entropy c. entropy into heat d. heat into work !

Calculate the work done by an external agent during an isothermal compression of 1.00 mol of oxygen from a volume of 22.4 l at 10∘c and 1.0 atm pressure to 16.8l

Difference between series and parallel circuits

What kind of waves require a medium to travel? question 6 options: light waves mechanical waves all waves need a medium to travel electromagnetic waves